.content > div {
    text-indent: 3em;
    font-family: 新宋体;
    font-size: 20px;
    line-height: 30px;
    margin-bottom: 30px;
}

.product > div {
    width: 150px;
    height: 150px;
    margin: 10px;
}

.product > div > img {
    width: 150px;
    height: 150px;
}

.product {
    /*overflow: hidden;*/
    /*margin-left: -50px;*/
    animation: move 5s linear infinite;
}
@keyframes move {
    0%{
        margin-left: 0;
    }
    25%{
        margin-left: -200px;
    }
    50%{
        margin-left: -400px;
    }
    75%{
        margin-left: -200px;
    }
    100%{
        margin-left: 0;
    }

}
.content + div {
    overflow: hidden;
}